Lead Android Developer

Role Summary

Billennium is a global technology company with over 20 years of experience, committed to innovation and empowering businesses. As an employer, we offer a supportive, growth-focused environment where collaboration and creativity thrive. Join us to shape the future of technology together!

Our client operates in the banking sector and is focused on the long-term evolution of its Android platform. The initiative aims to establish consistent engineering standards, strengthen CI/CD and mobile security, and expand the use of AI across the software development lifecycle.

What You Will Do

• Define and execute a 3–5-year technical strategy for the Android platform.
• Set, maintain, and enforce architecture, engineering, and code-quality standards across the Android ecosystem.
• Provide technical leadership for the Android platform, ensuring architectural consistency and quality while balancing standards with the pressure for rapid delivery.
• Mentor engineers, facilitate knowledge sharing, and develop technical capabilities across engineering teams.
• Optimize existing CI/CD pipelines or design scalable CI/CD processes from the ground up to support large development teams.
• Introduce and promote AI-powered engineering practices, including GitHub Copilot and LLM-based solutions supporting activities such as Code Review.
• Drive mobile application security practices, including third-party library vulnerability management, Software Composition Analysis (SCA), protection against reverse engineering, and alignment with OWASP Mobile guidance.

Requirements

• Extensive experience as a Senior Android Developer with strong expertise in Kotlin, Jetpack Compose, and Gradle / Gradle Kotlin DSL.
• At least 2–3 years of experience as an Android Tech Lead, Architect, or in a comparable technical leadership role.
• Hands-on experience designing and standardizing mobile application architectures, including Clean Architecture, MVVM/MVI, and multi-module architecture.
• Proven experience transforming and scaling CI/CD pipelines for large development teams, with practical knowledge of GitHub Actions or GitLab CI, Fastlane, and Gradle.
• Practical knowledge of mobile application security, including reverse engineering protection, vulnerability management, Software Composition Analysis (SCA), and OWASP Mobile.
• Experience automating code-quality controls using tools such as SonarQube and detekt.
• Strong strategic mindset with the ability to plan the evolution of an engineering platform over a multi-year horizon rather than focusing solely on individual features.

-Experience mentoring engineers, developing technical competencies, promoting knowledge sharing, and assertively maintaining engineering standards.

• Willingness to work from the office at least one day per month in Warsaw, Kraków, or Katowice. Nice-to-have
• Hands-on experimentation with GitHub Copilot, LLMs, or AI agents within the software development lifecycle, for example to support Code Review.

Benefits

• Comprehensive benefits - enjoy Udemy for Business, private medical care, Multisport card, veterinary package, language lessons, and shopping vouchers.
• Career growth - access opportunities for professional development and learning, including perks related to our official partnerships with global IT giants: Microsoft, AWS, Snowflake, Salesforce & more.
• Global collaboration - work with a diverse, international team. Innovative environment - be part of a forward-thinking and growth-oriented workplace.
• Engaging community – Work with passionate professionals and participate in team-building events, hackathons, and CSR initiatives to make an impact beyond work.
• Team-building events including our company tradition (annual company event in Mazury).
• A pleasant surprise to start your journey with us in the form of a welcome pack.